Rod guide



MAY 14, 1940- F. A; THAHELB 2,200,758

` 'A non GUIDE Filed Jan. 25, 1936 Patented M.y14,194o

UNITED STATESl BOD GUIDE Fen A; Thahei, Dallas, Guiberson Corporation, tion of vDelaware Application January 25,

10 Claims.

This invention relates to new and useful improvements in rod guides.

One object of the invention is to provide an improved rod guide arranged to be positioned in the tubing so that the rod slides therethrough and is more efficiently guided.

Another object of the invention is to provide a stationary rod guide having a vertically elongate conta'ctvwith the tubing and the rod, whereby the rods` are substantially centered in the tubing.

Still another object of the invention is to provide a `stationary rod guide having an elongate resilient cylindrical exterior for frictionally engaging in the tubing, and an inner rod guiding member, whereby a vertically amplified seating or engaging contact with the tubing is provided; also a long bearing for the rod obtained, which makes for reduced wearing' and less frequent replacing. 4

A further object of the invention is to provide a rod guide havinga rounded exterior structure and being resilient, whereby it "may be more readily inserted in' the tubing; and also whereby it will deform to not only provide elongate contacts, but to exert suilicient elastic force to hold it in position. Y

A particular object of the invention is to provide a stationary rod guide so arranged as to provide maximum vertical uid passages and yet being suiiiciently resilient to compensate irregularities in the tubing, thereby becoming selfaligning.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following speoication and )y reference to the accompanyingVv drawing, in which an example of the invention is shown, and vherein: Y

Figure l is a view of a device constructed in iccordance with the invention, positioned in a yubing which is illustrated in section,

Figure 2 is a vertical sectional view of the same,

Figure 3 is an enlarged horizontal cross-secional view taken on the line 3--3 of Figure 1, and

Figure 4 is a vertical sectional view of the guide vhen out of the tubing.

In the drawing, the numeral I designates a ylindrical body or bushing having an axial bore I extending therethrough. The bushing is prefrably formed of bronze or some suitable material or forming a bearing for the rod I2 which slides i the bore of the bushing; however it is preferble to provide considerableclearance between Tex., assignor to The Dallas, Tex., a corpora- 1936, serial Nn. 60,793 v (ci. sos-4) the rod and the"bo*re, so that the rod may slide freely and prevent displacement of the bushing thereby. The bushing is made in two longitudinal sections or halves, so that it may be assembled on the rod. As pump rods for wells usually have 5 heads at each end, it is necessary tofsplit the bushing in order to place it on the rod, The bushing is providedA with a cylindrical shank I3, intermediate its ends, having concaved `annular shoulders I5 at its top and bottom. An 10 v annularresilient collar or supporting member I5 is mounted on the shank and is sustained against vertical displacement by the shoulders I 4.` It is preferable to make the collar inthe form of an annular spring coil, using heavy wire for the purpose. It is preferable to form the collar with a cylindrical bore to snugly engage the shank I3, and to vertically curve the outer convolutions of the coil, as is shown in Figure 4. The collar is given a normalmedial diameter which is greater than the inner diameter of the tubing, so that when the guide is` inserted in the tubing the collar will be deformed into a cylindrical shapeas is shown in Figures 1 and 2. 'I'he compressed coil will not only provide` elongate vertical contacts, but will exert sufficient elastic force to hold the guide in place. While the collar has been shown in the form of a spring coil it could be formed otherwise so long as it provides the desired resiliency and supporting functions.

In operation, the rods 'I2 are lowered into the tubing as is the usual practice. When it is desired to place a guide on a rod, the collar I5 is engaged around the rod and the two halves of the bushing Ill are positioned on the rod above the collar. The collar is pushed upwardly onto the lower tapered end I6 of the bushing, whereby said collar is expanded and may then be forced onto the shank I3. The collar has a snug flt on the bushing and is held against movement verti- 4,w cally thereof by the shoulders I4.

The rod with the guide thereon is lowered into the tubing. When the guide enters the tubing, its resilient collar will be compressed or deformed so as ,to4 engage the inner wall and remain stationary, the rod sliding down through the bore II of the bushing until the head of the rod engages said bushing; The guide will be slid down the inside of the tubing. This will position the guide and it will remain stationary thereafter, 50 unless the rod is further lowered. When the rod is reciprocated to pump the well, it will slide through the bushing and the oil passing up the tubing will lubricate the same.

The resilient collar I5 will confine the bushing 55 i IV l members aboutithe rod, but care must be taken to its extreme resiliency, it will be self-adjusting.

and self-aligning.

What I claim and Patent, is:

l. A guide an elongate guide member adapted to receive a pump rod, said guide member having an annular circumferentially recessed portion and 'a resilient collar surrounding said member in said recessed portion and adapted to frictionally engage in a well tubing and remain stationary therein.

2. A guide for well pumping rods. including, an elongate bushing having a reduced shank intermediate its ends, and a resilient collar surrounding the shank of the bushing and adapted to frictlonally engage in a tubing and remain stationary therein.

3. A guide for well pumping -rods including, an elongate bushing having a reduced shank intermediate its ends, and an annular element comprising a spring coil surrounding the shank of the bushing and having its convolutions arranged to frictionally engage the inner wall of a tubing to hold the guide stationary in said tubing.

4. A guide for well pumping rods including, an elongate longitudinally split sectional bushing having a shank intermediate its ends, and an annular element comprising a spring coil surrounding the shank of the bushing and having desire to lsecure by -Letters its convolutions arranged to frictionally engage tubing, so as to remain longitudinally the inner wall of a tubing to hold the guide stationary insaid tubing, the coil hav- Y ing a diameter greater than the inner diameter of the tubing vand adapted to be deformed by engaging the tubing.

5. A guide for well pumping rods including.

an elongate bushing having a reduced shank intermediate its ends, shoulders, and. a resilient collar comprising an annular coiled spring element surrounding the shank of the bushing and held 4in place by its shoulders, the outer surface of the spring element being adapted to engage frictionally in a stationary within said to move the bushing. y

for well pumping rods including,

affording opposed annular ceive the pumping rodand to guide the same.'

6. A guide for well pumping rods adapted to be inserted in the usual tubing including, an

elongate' bushing having shoulders and a re- -duced shank between said shoulders, a resilient collar comprising a coiled spring surrounding the shank and holding said bushing spaced from the portion extending vertically of said reduced portion.

8. A guide for well pumping rods adapted to be inserted in the usual tubing including, a lbushing having shoulders prising a coiled spring seated in said reduced portion 'to hold said bushing stationary within said tubing and spaced therefrom, the inner and outer parts of said spring contacting said` bushing and tubing respectively extending vertically and with rounded edges at the top and bottom of said vertical portions.

9. A guide for well pumping rods be inserted bushing having shoulders with a reduced portion between said shoulders, a resilient collar comprising a coiled spring seated in said reduced portion to hold said bushing stationary within said tubing and spaced therefrom, one of said adapted to shoulders forming a cam' surface over which saidv spring may be inserted.

10. A guide for well pumping rods adapted to` be. inserted -in the usual tubing including, an elongate bushing having shoulders and a reduced shank between said shoulders, a resilient collar comprising a coiled spring. surrounding the shank and holding said bushing spaced from the well tubing so that oil may freely pass between said bushing and tubing, one of said shoulders forming a cam surface over which said spring may be inserted.

FERI A. THAHELD.

therefrom, the part of` in the'usual tubing including, a`

tubing, the said bushing" being adapted to rewith a reduced portion "between said shoulders, a resilient collar com- 

